William S. Day
Phys. Rev. (Series I) 6, 193 (1898) - Published 1 April, 1898
Albert P. Wills
Phys. Rev. (Series I) 6, 223 (1898) - Published 1 April, 1898
Oscar M. Stewart
Phys. Rev. (Series I) 6, 239 (1898) - Published 1 April, 1898
Phys. Rev. (Series I) 6, 252 (1898) - Published 1 April, 1898